In a small bowl, combine 1 tablespoon oil, soy sauce, cornstarch, sherry and brown sugar. Add beef and toss to coat. Set aside.
Heat wok to medium high heat. Drizzle 1 tablespoon oil. Add beef and cook until browned. Transfer to a plate.
Add 1 tablespoon oil to the wok and saute garlic and ginger until fragrant. Add the corn, bell peppers, green onions and jalapeno. Cook for few minutes. Return the beef and stir. Heat for 2 more minutes. Adjust seasoning if needed. Serve
Recipe by The Gluten Free at https://www.theglutenfree.com/gluten-free-hunan-chili-beef/